function h=putline(xnot,ynot,slope,length,color)
% h=putline(xnot,ynot,slope,length,color)
% h=putline(xnot,ynot,length,slope)
%
% PUTLINE draws a line in the current axes at the point (xnot,ynot) having
% slope 'slope' and length 'length'. Color is a normal matlab color
% spec giving the color. The return value is the handle of the line.
%
% G.F. Margrave November, 1993
% 
% NOTE: This SOFTWARE may be used by any individual or corporation for any purpose
% with the exception of re-selling or re-distributing the SOFTWARE.
% By using this software, you are agreeing to the terms detailed in this software's
% Matlab source file.

% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by
% its 'AUTHOR' (identified above) and the CREWES Project.  The CREWES
% project may be contacted via email at:  crewesinfo@crewes.org
%
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
%
% Terms of use of this SOFTWARE
%
% 1) This SOFTWARE may be used by any individual or corporation for any purpose
%    with the exception of re-selling or re-distributing the SOFTWARE.
%
% 2) The AUTHOR and CREWES must be acknowledged in any resulting publications or
%    presentations
%
% 3) This SOFTWARE is provided "as is" with no warranty of any kind
%    either expressed or implied. CREWES makes no warranties or representation
%    as to its accuracy, completeness, or fitness for any purpose. CREWES
%    is under no obligation to provide support of any kind for this SOFTWARE.
%
% 4) CREWES periodically adds, changes, improves or updates this SOFTWARE without
%    notice. New versions will be made available at www.crewes.org .
%
% 5) Use this SOFTWARE at your own risk.
%
% END TERMS OF USE LICENSE
	theta=atan(slope);
	delta=abs(length*cos(theta)/2.);
	x1=xnot-delta;
	x2=xnot+delta;
	y1=slope*(x1-xnot)+ynot;
	y2=slope*(x2-xnot)+ynot;
	if( nargin > 4)
		h=line([x1 x2],[y1 y2],'color',color);
	else
		h=line([x1 x2],[y1 y2]);
	end